Lemmy let's you un-delete anything you've deleted, so nothing really gets nuked (it seems to be the way these things work anyway, that it's just a 'deleted' flag that's flipped between true and false).
On the one hand, it's a Lemmy problem - I can see you're comment using the API:
curl --request GET \
--url 'https://lemmy.world/api/v3/comment?id=8986376' \
--header 'accept: application/json'
=>
{
"comment_view": {
"comment": {
"id": 8986376,
"creator_id": 399371,
"post_id": 13748490,
"content": "See what i mean? I deleted this!",
"removed": false,
"published": "2024-03-31T09:48:22.897008Z",
"deleted": true,
"ap_id": "https://lemmy.world/comment/8986376",
"local": true,
"path": "0.8986376",
"distinguished": false,
"language_id": 37
...
But there's also a bug with Sync in that it's not checking the flag if someone try to reply.